$1B spent, and we are still unsafe?!?

This article explains how we spent $1B on technology that did not work, and this fact was not revealed until after the technology was obsolete.  If the folks who keep the secrets in our government can’t do a better job, then we need to change something.  This is scary, and embarrassing.  And it is not protecting us.  Why would they approve technology that does not protect us?  Is this all about Big Business selling crap to make money?  The cynic in me tries to find a different explanation, and fails.

http://www.wired.com/2014/08/study-shows-how-easily-weapons-can-be-smuggled-past-tsas-x-ray-body-scanners/